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Error Cannot Synthesize Dual-port Ram Logic

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I don't believe this. Generated Mon, 10 Oct 2016 15:39:51 GMT by s_wx1094 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://0.0.0.9/ Connection Last edited by FvM; September 23rd, 2010 at 09:07 AM. Reply With Quote September 27th, 2010,03:19 AM #10 ammar View Profile View Forum Posts Altera Pupil Join Date May 2010 Location Germany Posts 19 Rep Power 1 Re: True Dual Port his comment is here

How is posterior derived Wrong password - number of retries - what's a good number to allow? The coding styles for inferring ram blocks for Altera can be found in http://www.altera.com/literature/hb/qts/qts_qii51007.pdf#page13 This is one of the reasons why it is strongly suggested that if you wish to use It will be up to you to modify your other logic to behave correctly. Reply With Quote Page 1 of 3 123 Last Jump to page: Quick Navigation General Altera Discussion Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums

Error Cannot Synthesize Dual-port Ram Logic

Prior to joining Altera in 1996, Simpson held several engineering roles at various EDA and semiconductor companies, including EDA Solutions, Data I/O and Lucas Aerospace. Register Help Remember Me? Genom att använda våra tjänster godkänner du att vi använder cookies.Läs merOKMitt kontoSökMapsYouTubePlayNyheterGmailDriveKalenderGoogle+ÖversättFotonMerDokumentBloggerKontakterHangoutsÄnnu mer från GoogleLogga inDolda fältBöckerbooks.google.se - This book describes best practices for successful FPGA design.

Browse other questions tagged fpga vhdl quartus-ii or ask your own question. The problem here is probably down to your logic inside the FPGA. 2. Generated Mon, 10 Oct 2016 15:39:51 GMT by s_wx1094 (squid/3.5.20) Cannot synthesize dual-port RAM logic "" (ID: 276001) CAUSE: In a Verilog Design File (.v) or VHDL Design File (.vhd), you specified logic that acts as RAM with at least two

Raise an enhancement request with altera. it is also not listed in the coding templates. You should check in the Cyclone III hardware manual, if your intended configuration is feasible with this FPGA. http://zet.aluzina.org/forums/viewtopic.php?f=5&t=229 On a side note: to avoid all the stuff you get with the megawizard, instantiate rams directly in your code.

or is their a special way to flash a RAM module to fpga?) this is my first time to use FPGA as a memory module so this is why i have That's not supported. If I change the code to PROCESS (iCLK) BEGIN IF(rising_edge(iCLK)) THEN -- Mise en mémoire du pixel ram(640*IdxC + PixX) <= PIXIN; -- Choix traitement IF (SWITCH='1') THEN PIXOUT <= ram(640*((IdxC By gaining an understanding into their design environments, processes, what works and what does not work, key...https://books.google.se/books/about/FPGA_Design.html?hl=sv&id=UGN1CQAAQBAJ&utm_source=gb-gplus-shareFPGA DesignMitt bibliotekHjälpAvancerad boksökningKöp e-bok – 674,23 krSkaffa ett tryckt exemplar av den här bokenSpringer ShopAmazon.co.ukAdlibrisAkademibokandelnBokus.seHitta

Reply With Quote September 23rd, 2010,09:02 AM #6 FvM View Profile View Forum Posts Altera Guru Join Date Dec 2007 Location Bochum Germany Posts 5,907 Rep Power 1 Re: True Dual click to read more There is no chip select in the HDL template provided by quartus. Error Cannot Synthesize Dual-port Ram Logic Why was Kepler's orbit chosen to continue to drift away from Earth? What is not possible is setting the read/write before write/read behaviour by using a shared variable (whereas you can with other other brand).

If you know that the configuration is supported, but you have difficulties to infer it from VHDL code, try the Quartus language templates. What is the meaning and etymology of "cod-French" accent? Reply With Quote September 23rd, 2010,06:21 AM #5 Tricky View Profile View Forum Posts Moderator **Forum Master** Join Date Oct 2008 Posts 5,082 Rep Power 1 Re: True Dual Port Ram It is the result of the author’s meetings with hundreds of customers on the challenges facing each of their FPGA design teams.

It's decided it can't recognise the RAM and infer a RAM block because of the extra clause. Why was Gilderoy Lockhart unable to be cured? To work around it, try creating a variable (or signal) that is purely RAM output (not necessarily valid), and separate logic to blank it when desired, rather than doing both tasks weblink Reply With Quote September 27th, 2010,02:59 AM #9 Tricky View Profile View Forum Posts Moderator **Forum Master** Join Date Oct 2008 Posts 5,082 Rep Power 1 Re: True Dual Port Ram

I tried compiling you code, I got this error: Info: RAM logic "ram" is uninferred due to inappropriate RAM size Plus you also have a chip select. which doesn't seems normal to me, or is it okay??? The system returned: (22) Invalid argument The remote host or network may be down.

All the solutions that work cover all the cases for the address signal, inferred or not.

Converting SCART to VGA/Jack Coworker being disrespectful in meetings and other areas Could intelligent life have existed on Mars while it was habitable? Perhaps you should show us the rest of the module in which this appears. –Dave Tweed♦ Jan 12 '13 at 16:08 You may find even else PIXOUT <= ram(some regards Ammar Reply With Quote September 23rd, 2010,05:31 AM #2 FvM View Profile View Forum Posts Altera Guru Join Date Dec 2007 Location Bochum Germany Posts 5,907 Rep Power 1 Re: Please try the request again.

In this role, Simpson is responsible for Altera’s Quartus II software and third-party EDA interfaces product planning and the creation of the Altera design flow software roadmap. and yes i have checked the Cyclone III hand book, and it supports true-dual port ram with two clock inputs for each port. Förhandsvisa den här boken » Så tycker andra-Skriv en recensionVi kunde inte hitta några recensioner.Utvalda sidorTitelsidaInnehållIndexReferensInnehållIntroduction1 Project Management5 Design Specification9 System Modeling15 Resource Scoping29 Design Environment39 Board Design53 Power and Thermal Analysis67 check over here Your cache administrator is webmaster.

The goal being to increase the productivity of FPGA design teams by establishing a common methodology across design teams; enabling the exchange of design blocks across teams.Coverage includes the complete FPGA Not the answer you're looking for? Realize that to infer the ram, it must also infer a few signals and their values, one of which is the address input. ok, if there somthing wrong with this code, then to omit this fear, i used the quatrus ii template for true dualport ram, and flash tht to fpga, reaction of fpga

You want it to infer a dual port ram, the compiler wants to infer a dual port ram, however the process in the problem snippet does not properly describe the address You can control all the paramters yourself. So yes, Quartus CAN infer true-dual port rams quite easily. I'm not saying that this is the exact reason why it is giving up, but it should be clear that the compiler would have difficulties filling in the blanks for the

zet.aluzina.orgEnd user forums for Zet Login Register FAQ Search It is currently 10 Oct 2016, 17:52 View unanswered posts | View active topics Board index All times are Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Should work in a single process though. –Brian Drummond Jan 12 '13 at 16:07 I edited your comment back into the question so that it is readable. BUT the problem is the same when i flash this code to fpga, i get the same problem that micro-controller stops working.

but i get this error. It ends up being a bit too much, so it probably gives up, but then alternative solution does not fit the device. You could test declaring the signal and then coding it the same way so that it has to infer a latch, and it may even compile because now at least would Your cache administrator is webmaster.

So it would have to infer a latch and the warning would be an awkward "inferring latch on inferred address signal of inferred ram". Reply With Quote September 27th, 2010,02:12 AM #8 ammar View Profile View Forum Posts Altera Pupil Join Date May 2010 Location Germany Posts 19 Rep Power 1 Re: True Dual Port The resulting number of registers remaining in design exceeds the number of registers in the device or the number specified by the assignment max_number_of_registers_from_uninferred_rams. Gracefully handling corrupted state exceptions Is it a fallacy, and if so which, to believe we are special because our existence on Earth seems improbable?